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From 666a205254d095947de95670f014fe30137c0014 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Nikola=20Forr=C3=B3?= <nforro@redhat.com>
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Date: Thu, 6 Dec 2018 14:59:10 +0100
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Subject: [PATCH 08/10] Fix CVE-2018-17101
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---
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tools/pal2rgb.c | 18 +++++++++++++++++-
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tools/tiff2bw.c | 18 +++++++++++++++++-
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2 files changed, 34 insertions(+), 2 deletions(-)
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diff --git a/tools/pal2rgb.c b/tools/pal2rgb.c
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index 426bbc0..994757a 100644
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--- a/tools/pal2rgb.c
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+++ b/tools/pal2rgb.c
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@@ -389,7 +389,23 @@ cpTags(TIFF* in, TIFF* out)
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{
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struct cpTag *p;
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for (p = tags; p < &tags[NTAGS]; p++)
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- cpTag(in, out, p->tag, p->count, p->type);
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+ {
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+ if( p->tag == TIFFTAG_GROUP3OPTIONS )
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+ {
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+ uint16 compression;
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+ if( !TIFFGetField(in, TIFFTAG_COMPRESSION, &compression) ||
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+ compression != COMPRESSION_CCITTFAX3 )
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+ continue;
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+ }
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+ if( p->tag == TIFFTAG_GROUP4OPTIONS )
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+ {
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+ uint16 compression;
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+ if( !TIFFGetField(in, TIFFTAG_COMPRESSION, &compression) ||
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+ compression != COMPRESSION_CCITTFAX4 )
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+ continue;
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+ }
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+ cpTag(in, out, p->tag, p->count, p->type);
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+ }
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}
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#undef NTAGS
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diff --git a/tools/tiff2bw.c b/tools/tiff2bw.c
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index 02605df..53067e7 100644
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--- a/tools/tiff2bw.c
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+++ b/tools/tiff2bw.c
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@@ -427,7 +427,23 @@ cpTags(TIFF* in, TIFF* out)
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{
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struct cpTag *p;
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for (p = tags; p < &tags[NTAGS]; p++)
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- cpTag(in, out, p->tag, p->count, p->type);
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+ {
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+ if( p->tag == TIFFTAG_GROUP3OPTIONS )
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+ {
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+ uint16 compression;
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+ if( !TIFFGetField(in, TIFFTAG_COMPRESSION, &compression) ||
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+ compression != COMPRESSION_CCITTFAX3 )
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+ continue;
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+ }
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+ if( p->tag == TIFFTAG_GROUP4OPTIONS )
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+ {
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+ uint16 compression;
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+ if( !TIFFGetField(in, TIFFTAG_COMPRESSION, &compression) ||
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+ compression != COMPRESSION_CCITTFAX4 )
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+ continue;
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+ }
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+ cpTag(in, out, p->tag, p->count, p->type);
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+ }
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}
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#undef NTAGS
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--
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2.17.2
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